The heat recovery system typically handles flows up to about 12 liters/minute when showering - equivalent to the flow from a modern overhead shower.
For flows greater than 12 liters/minute, the excess water will flow via the floor drain's overflow directly to the sewer (without heat recovery). The overflow ensures that the floor drain always functions as a normal floor drain with high flow capacity at worst.
Normative flow capacity (for heat exchanger + board drain) is designed for flows > 80 liters/minute. Figures for normative flow capacity will be updated after independent type tests performed by RISE in the fall of 2023.
